/Engine/Source/Runtime/Renderer/Public/InstanceCulling/InstanceCullingContext.h
Auxiliary info for each mesh draw command that needs submitting.
struct FMeshDrawCommandInfo
uint32:  1U
bUseIndirect
Flag to indicate if using indirect or not.
uint32:  31U
IndirectArgsOffsetOrNumInstances
Stores either the offset (in bytes) to the indirect args or the number of instances
uint32
InstanceDataByteOffset
Offset into per-instance buffer